Understanding and incorporating optical considerations into the treatment of patients undergoing keratorefractive surgery is important to enhance the visual results. Patient dissatisfaction after surgery, albeit rare, often stems from the subjective loss of visual acuity or quality, the source of which can usually be identified through a sound understanding of how keratorefractive surgery alters the optics of the eye. A good understanding of key parameters such as corneal shape, pupil size, the ocular surface, spherical and astigmatic errors, higher-order aberrations, laser centration and the angle kappa, and irregular corneal astigmatism can help optimize visual outcomes for keratorefractive surgery.
Excerpted from BCSC 2020-2021 series : Section 3 - Clinical Optics. For more information and to purchase the entire series, please visit https://www.aao.org/bcsc.